package com.sky.Aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Component
@Slf4j
@Aspect
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut(){}
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("开始进行数据填充");
        //获取当前被拦截的方法的数据库操作类型
        OperationType operationType = ((MethodSignature) joinPoint.getSignature()).
                getMethod().getAnnotation(AutoFill.class).value();
         Object[] args = joinPoint.getArgs();
         if (args == null || args.length == 0)
             return;
         Object entity = args[0];
        //准备赋值的数据

        if (operationType == OperationType.INSERT){
            Method setCreateTime = entity.getClass().getMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setUpdateTime = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setCreateUser = entity.getClass().getMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setUpdateUser = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setCreateTime.invoke(entity, LocalDateTime.now());
            setUpdateTime.invoke(entity, LocalDateTime.now());
            setCreateUser.invoke(entity, BaseContext.getCurrentId());
            setUpdateUser.invoke(entity, BaseContext.getCurrentId());

        } else if (operationType == OperationType.UPDATE) {
            Method setUpdateTime = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setUpdateTime.invoke(entity, LocalDateTime.now());
            setUpdateUser.invoke(entity, BaseContext.getCurrentId());
        }
    }
}
